/*
 * Copyright 2008 Carnegie Mellon University
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *  
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, 
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package edu.cmu.lti.sepia.api.processor;

import javax.servlet.http.HttpServletRequest;

import org.json.JSONObject;

import edu.cmu.lti.sepia.api.json.JsonAction;
import edu.cmu.lti.sepia.data.db.AnswerDAO;
import edu.cmu.lti.sepia.data.db.SQL;
import edu.cmu.lti.sepia.data.db.TopicDAO;
import edu.cmu.lti.sepia.infra.topic.model.Answer;
import edu.cmu.lti.sepia.util.ExceptionUtil;
import edu.cmu.lti.sepia.util.ServletUtil;

public class AnswerProcessor extends AbstractProcessor {
		
	@Override
	public JSONObject process( SQL sql, JsonAction action, HttpServletRequest request ) {
		ServletUtil servletUtil = new ServletUtil( request );
		
		String taskNameShort = servletUtil.readString( "taskNameShort", "" );
		String tool = servletUtil.readString( "tool", "" );
		int topicId = servletUtil.readInt( "topicId", -1 );
		Answer answer = AnswerDAO.parseRequest(request);
				
    JSONObject json = new JSONObject();
    try {
      json.put("msg","succeeded");
  		
  		if ( action.equals( JsonAction.AddAnswer ) ) {
  			AnswerDAO.addAnswer( sql, taskNameShort, answer );
  			json = TopicDAO.convertTopics( TopicDAO.findById( sql, taskNameShort, tool, topicId ) );
  		} else if ( action.equals( JsonAction.DeleteAnswer ) ) {
  			AnswerDAO.deleteAnswer( sql, taskNameShort, answer.getAnswerId() );
  			json = TopicDAO.convertTopics( TopicDAO.findById( sql, taskNameShort, tool, topicId ) );
  		} else if ( action.equals( JsonAction.UpdateAnswerText ) ) {
        AnswerDAO.updateAnswerBearingText( sql, taskNameShort, answer.getAnswerId(), answer.getAnswerBearingText() );
      } else if ( action.equals( JsonAction.UpdateAnswerLabel ) ) {
        AnswerDAO.updateLabel( sql, taskNameShort, answer.getAnswerId(), answer.getLabel() );
      }
    } catch ( Exception e ) {
      e.printStackTrace();
      try {
        json.put("exception", ExceptionUtil.exceptionToString(e));
      } catch (Exception e2) {
        e2.printStackTrace();
      }
    }
    return json;
  }
		
}
